Fairchild FEB137-002, FEB138-002, FAN2002, FAN2001 User Manual

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FEB137-002 / FEB138-002

User Guide

FAN2001 / FAN2002

Evaluation Board

Featured Fairchild Product: FAN2001 / FAN2002

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Table of Contents

1. Features ..................................................................................................................................................3

2. Description .............................................................................................................................................3

3. Operation................................................................................................................................................3

4. PCB Layout............................................................................................................................................4

5. Waveforms .............................................................................................................................................4

6. Schematics..............................................................................................................................................5

7. Materials Lists........................................................................................................................................6

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The following user guide supports the evaluation kit for the FAN2001 and FAN2002. It should be used in conjunction with the device datasheet as well as Fairchild application notes and technical support team. Visit Fairchild’s website at www.fairchildsemi.com.

1. Features

 2.5 to 5.5V Input Range  Up to 1A Output Current  Adjustable Output from 0.8V to V  Thermal Shutdown, Short-Circuit Protection, Soft Start, Output Over-Voltage Protection  1.3MHz Fixed-Frequency PWM Operation at Heavy Load and Burst Operation at Light Load  Up to 96% Efficiency, Synchronous Operation  Pb-Free, 6-lead 3x3mm MLP Package

2. Description

The FAN2001/2 Evaluation Board is a compact circuit including either the FAN2001 MPX or the FAN2002 MPX in a 3x3mm MLP package. Both models feature an external resistor divider for varying output voltage and differ only in pin out. The FAN2001/2 demo board, a completely assembled and tested surface mount board, provides easy probe access points to all inputs and outputs so that electrical characteristics and waveforms can be easily measured.

IN

3. Operation

1. Connect VIN (2.5 to 5.5V) and GND (0V).

2. Use a jumper to toggle the circuit between "ON" and "OFF" modes.

3. Observe that, for varying input levels, if V

constant.

4. The output voltage level is V

10K. For V Note: R2 and R1 values are reversed for FAN2002MPX.

5. To verify supply current in “ON” and “OFF” modes; observe that, in shutdown mode, supply

current drops below 1µA and in "ON" mode, I

6. If quiescent current is a key design parameter, a higher value feedback resistor R2 can be

used, along with a small bypass capacitor C

OUT

> V

IN

OUT

= V

(1 + (R1/R2)) where V

REF

= 1.2V, R1 is preset to 5K and for V

< 50µA.

Q

(e.g. R2 = 100K and CF = 10pF).

F

+ 0.6V and I

= 3.3V, R1 is preset to 31.25K.

OUT

< 1A, V

LOAD

= 0.8V (typical) and R2 =

REF

remains

OUT

Figure 1. FAN2001MPX Board Figure 2. FAN2002MPX Board

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4. PCB Layout

Figure 3. FAN2001MPX PCB Layout

5. Waveforms

Figure 4. FAN2002MPX PCB Layout

Figure 5. Start-Up Waveform in Full Load (VIN=5.5V)

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6. Schematics

V

IN

C

10µF

ON

OFF

1

VIN

IN

2

PGND

3

EN

VOUT

P1

Note: Cf is OPEN (not installed on regular eval board.)

NC

FB

6

5

L

3.3µH

R1

Cf

C2

10µFC310µF

4

R2

10K

V

OUT

Figure 6. FAN2001MPX Schematic (R1 = 5K for V

= 1.2V and R1 = 31.25K for V

OUT

OFF

= 3.3V)

OUT

ON

V

IN

1

FB

EN

6

R1

L

3.3µH

10K

2

3

PGND

SW

P1

PVIN

= 1.2V and R1 = 31.25K for V

OUT

VIN

5

4

C

IN

10µF

OUT

= 3.3V)

R2

V

OUT

C1

10µF

Figure 7. FAN2002MPX Schematic (R1 = 5K for V

Cf

C2

10µF

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7. Materials Lists

Table 1. FAN2001MPX List of Materials

Description Qty. Ref. Vendor Part Number

Inductor 3.3µH, I

Capacitor 10µF, 10%, 6.3V, X5R, 1206 3 C2, C3, CIN

Resistor 10Kohm, 1%, 1206 1 R2 Any Resistor 31.25Kohm, 1%, 0805

(for option V Resistor 4.99Kohm, 1%, 0805

(for option V Hardware Connector Header .

1 SINGLE STR 36POS IC DC/DC Regulator, 6-lead MLP 3x3mm,

FSID: FAN2001MPX Hardware, SHUNT, PHBR 15AU 1 ON/OFF DIGI-KEY A26227-ND

Table 2. FAN2002 MPX List of Materials

= 0.5A 1 L Any

sat

MURATA

Panasonic

set 3.3V)

OUT

set 1.2V)

OUT

1 R1 Any

VIN, V

9

1 U1

, GND,

OUT

ON/OFF

Digi-Key

Fairchild

Semiconductor

GRM31CR70J106K

ECJ-3YB0J106K

S1011-36-ND

FAN2001MPX

Description Qty. Ref. Vendor Part Number

Inductor 3.3µH, I

Capacitor 10µF, 10%, 6.3V, X5R, 1206 3 C1, C2, CIN

Resistor 10Kohm, 1%, 1206 1 R1 Any Resistor 31.25Kohm, 1%, 1206

(for option V Resistor 4.99Kohm, 1%, 1206

(for option V Hardware Connector Header

.1 SINGLE STR 36POS IC DC/DC Regulator, 6-lead MLP 3x3mm,

FSID: FAN2002MPX Hardware, SHUNT, PHBR 15AU 1 ON/OFF DIGI-KEY A26227-ND

= 0.5A 1 L Any

sat

MURATA

Panasonic

VIN, V

ON/OFF

R2

OUT

U1

, GND,

Any

Digi-Key

Fairchild

Semiconductor

set 3.3V)

OUT

set 1.2V)

OUT

1

9

1

GRM31CR70J106K

ECJ-3YB0J106K

S1011-36-ND

FAN2002MPX

Table 3. Ordering Information

Product Number Package Type Order Code

FAN2001 Pb-Free, 6-Lead 3x3mm Molded Leadless Package (MLP) FAN2001MPX FAN2002 Pb-Free, 6-Lead 3x3mm Molded Leadless Package (MLP) FAN2002MPX

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TRADEMARKS

The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks.

®

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2

CMOS™

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®

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FACT

®

FAST FASTr™ FPS™

WARNING AND DISCLAIMER

Replace components on the Evaluation Board only with those parts shown on the parts list (or Bill of Materials) in the Users’ Guide. Contact an authorized Fairchild representative with any questions.

The Evaluation board (or kit) is for demonstration purposes only and neither the Board nor this User’s Guide constitute a sales contract or create any kind of warranty, whether express or implied, as to the applications or products involved. Fairchild warrantees that its products meet Fairchild’s published specifications, but does not guarantee that its products work in any specific application. Fairchild reserves the right to make changes without notice to any products described herein to improve reliability, function, or design. Either the applicable sales contract signed by Fairchild and Buyer or, if no contract exists, Fairchild’s standard Terms and Conditions on the back of Fairchild invoices, govern the terms of sale of the products described herein.

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

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FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION.

As used herein:

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